MP/H Rules/Histology--Prostate: While cases of "acinar adenocarcinoma" of the prostate are required to be abstracted with the histology code 8140/3 [adenocarcinoma, NOS] for cases diagnosed 1/1/07 or later, can 8550/3 [acinar adenocarcinoma] be used for cases diagnosed prior to 1/1/07? See Discussion.
MP/H Rules/Behavior--Breast: How are behavior and histology coded when the pathology report final diagnosis is "ductal carcinoma in situ and lobular carcinoma in situ" if the microscopic examination section of the same pathology report states there are "foci suspicious for microinvasive carcinoma"? See Discussion.
MP/H Rules/Histology--Breast: How is histology coded for a single tumor with ductal and tubular features in only the invasive component and not in the in situ component? See Discussion.
MP/H Rules/Histology--Colon: The final diagnosis on a path report for a colon specimen says: Is a colon specimen final diagnosis of carcinoma in situ in a serrated adenoma coded to 8010/2, 8210/2 or 8213/2?
MP/H Rules/Histology--Thyroid: How is the histology coded for a poorly differentiated thyroid carcinoma with rhabdoid phenotype arising in a papillary carcinoma?
MP/H Rules/Histology: In the absence of a tissue diagnosis, should the histology field be coded based on the findings of a suspicious cytology or a CT scan that clinically confirmed the diagnosis? See Discussion.
MP/H Rules/Primary site: What is the primary site and histology for a focus of papillary thyroid cancinoma, follicular variant, arising in thyroid tissue of mature cystic teratoma of the ovary?
MP/H Rules/Histology--Breast: If an in situ carcinoma diagnosed in 2007 demonstrates comedo necrosis, should the histology be coded to comedocarcinoma in situ? See Discussion.
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